Ethylboronic acid is widely used in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions. It serves as a key reagent for forming carbon-carbon bonds, enabling the creation of complex organic molecules, including pharmaceuticals and agrochemicals. Its stability and reactivity make it valuable in synthesizing biaryl compounds, which are essential in drug development. Additionally, it is employed in the preparation of boron-containing polymers and materials, contributing to advancements in material science. Its role in catalytic processes and as a building block in organic chemistry highlights its versatility in research and industrial applications.